Romney overtakes Santorum in Wisconsin

Mitt Romney has overtaken Rick Santorum in a new poll of Wisconsin voters a week before Badger State residents vote.

Santorum led Romney last month but Romney now holds a 39%-31% lead in the Marquette Law School Poll, released Tuesday. Ron Paul and Newt Gingrich run a distant third and fourth, with 11% and 5%, respectively.

In February, Santorum had a 34%-18% lead over Romney.

Wisconsin — along with the District of Columbia and Maryland — holds its presidential primary on April 3. A combined 98 delegates are at stake that day. Even if Santorum won every delegate on April 3 — and he cannot, because he didn’t qualify for the ballot in D.C. — he’d still be far behind Romney, who now has 568 delegates to Santorum’s 273. It takes 1,144 to clinch the Republican nomination.